反应详情

温度

260 °C

Sodium (0.4 grams) is added to pyridine-4-carbonitrile (8.3 grams, 0.08 mole) in methanol, and the solution is allowed to stand 30 minutes at room temperature. A suspension of pyrazine carboxylic acid hydrazide (9.6 grams, 0.07 mole) in methanol (160 ml.) is added, and the resulting solution is heated at reflux for 30 minutes. After cooling, the intermediate acylamidrazone is collected by filtration. The acyclic intermediate is then heated at 260° C. for 15 minutes, after which the reaction is cooled to room temperature. Upon recrystallization from acetonitrile-water, 3-pyrazinyl-5-(4-pyridyl)-1,2,4-triazole is obtained, m.p. 251°-252.5° C.

1. additionis added
2. temperaturethe resulting solution is heated
3. temperatureat reflux for 30 minutes
4. temperatureAfter cooling
5. filtrationthe intermediate acylamidrazone is collected by filtration
6. temperatureafter which the reaction is cooled to room temperature
7. customUpon recrystallization from acetonitrile-water